butt gravey
that brown juice that seeps from the anal sphincter. When combined with ass wind, it results in a shart. Sometimes it is a result of poor asslasticity and lethargic sphincter reaction time during a healthy fart.
Dang butt gravey keeps stainin my underwear.
gravey butt
When someone has an outburst of poop out there butt and it causes a terrible smell of shit .
Bill went down on maci and all he could smell was gravey butt.